Constant MAGIC_CONTEXT_SIZE 

pub const MAGIC_CONTEXT_SIZE: usize = _; // 5_242_880usize

We believe 5MB should be enough to store all scheduled commits within a slot. Once we store more data in the magic context we need to reconsicer this size. NOTE: the default max accumulated account size per transaction is 64MB. See: MAX_LOADED_ACCOUNTS_DATA_SIZE_BYTES inside program-runtime/src/compute_budget_processor.rs